WO2013160151A1 - Device for capacitive detection with arrangement of linking tracks, and method implementing such a device - Google Patents

Device for capacitive detection with arrangement of linking tracks, and method implementing such a device Download PDF

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Publication number
WO2013160151A1
WO2013160151A1 PCT/EP2013/057900 EP2013057900W WO2013160151A1 WO 2013160151 A1 WO2013160151 A1 WO 2013160151A1 EP 2013057900 W EP2013057900 W EP 2013057900W WO 2013160151 A1 WO2013160151 A1 WO 2013160151A1
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WO
WIPO (PCT)
Prior art keywords
electrodes
tracks
transparent
conductive
electrode
Prior art date
Application number
PCT/EP2013/057900
Other languages
French (fr)
Inventor
Didier Roziere
Christophe BLONDIN
Original Assignee
Fogale Nanotech
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Fogale Nanotech filed Critical Fogale Nanotech
Priority to CN201380021798.1A priority Critical patent/CN104321726B/en
Priority to JP2015507470A priority patent/JP6463669B2/en
Priority to US14/115,008 priority patent/US9104283B2/en
Priority to KR1020147030605A priority patent/KR102028783B1/en
Priority to EP13721285.8A priority patent/EP2842018A1/en
Publication of WO2013160151A1 publication Critical patent/WO2013160151A1/en

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Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0444—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a single conductive element covering the whole sensing surface, e.g. by sensing the electrical current flowing at the corners
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G06F3/0418—Control or interface arrangements specially adapted for digitisers for error correction or compensation, e.g. based on parallax, calibration or alignment
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G06F3/04166—Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0443—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a single layer of sensing electrodes
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0446—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/048—Interaction techniques based on graphical user interfaces [GUI]
    • G06F3/0484—Interaction techniques based on graphical user interfaces [GUI] for the control of specific functions or operations, e.g. selecting or manipulating an object, an image or a displayed text element, setting a parameter value or selecting a range
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04104—Multi-touch detection in digitiser, i.e. details about the simultaneous detection of a plurality of touching locations, e.g. multiple fingers or pen and finger
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04107—Shielding in digitiser, i.e. guard or shielding arrangements, mostly for capacitive touchscreens, e.g. driven shields, driven grounds
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04108—Touchless 2D- digitiser, i.e. digitiser detecting the X/Y position of the input means, finger or stylus, also when it does not touch, but is proximate to the digitiser's interaction surface without distance measurement in the Z direction

Definitions

  • Capacitive sensing device with arrangement of connecting tracks and method using such a device.
  • the present invention relates to a capacitive measuring device between an object and an electrode plane. It applies in particular in the general field of 2D capacitive touch surfaces and 3D capacitive sensing used for human machine interface commands. More and more communication and work devices use a touch control interface such as a pad or screen. Examples include mobile phones, smartphones, electronic notebooks, PCs, mice, slabs, giant screens
  • the touch surface is equipped with conductive electrodes connected to electronic means making it possible to measure the variation of the capacitances created between the electrodes and the object to be detected in order to carry out a command.
  • This technology makes it possible to detect the presence and the position of the finger through a dielectric.
  • This technique has the advantage of obtaining a very good resolution on the location in the XY plane of the sensitive surface of one or more fingers.
  • these techniques have the disadvantage of only detecting a contact of the object or even a detection very close but not exceeding a few mm. It is difficult to make tactile commands with thick gloves (ski glove, biker ...), with long nails or a stylus. The low sensitivity of the capacitive electrodes does not allow triggering a command through thick dielectric.
  • Detection is done in 3-dimensional space XYZ but also in touch on the XY plane. This time we can trigger a command with a glove or through any type of thick dielectric.
  • These techniques are possible by using a measurement electronics absolute capacity to detect as far as possible the position of the object or objects in the space near the active surface (above and around the slab). The ideal is to cover the entire surface of the slab of capacitive electrodes. These electrodes are connected to electronics to convert the capacitance created between each electrode and the object (s) to be detected.
  • the detection in a large distance volume has the disadvantage of detecting any object near the panel but outside its surface. This can limit the control possibilities or reduce the visible surface of the panel or untimely trigger commands For this, we can for example ensure that the entire surface of the slab is only equipped with electrodes without apparent electrical connection to prevent the surrounding object or objects such as the end of the fingers of the hand which maintain the portable device is detected as desired objects.
  • One solution is to use a multilayer capacitive slab such as a PCB ("Printed Circuit Board").
  • the capacitive electrodes are deposited on the outer object-side surface to be detected and all the connecting tracks are located below the electrodes at a lower layer. These tracks are connected to the electrodes through metallized holes via the electrode layer. All tracks are connected to the electronics but are kept until the connection (a guard layer is located below the connecting tracks).
  • the electrodes play their guarding role vis-à-vis the tracks using an electronic floating example as described in the patent FR2756048.
  • capacitive electrode surfaces must be equipped with transparent electrodes in order to let the light emitted by the display under the slab pass.
  • electrically conductive electrodes are made of ITO (Indium tin oxide). This material has good optical and electrical properties. For technical, manufacturing and optical quality problems, it is not possible to use metallized holes and all the capacitive electrodes must be connected to the external circuit at the sensitive surface only by means of a transparent track located on the same layer as these electrodes.
  • the object of the present invention is to optimize the arrangement of the connection tracks of the electrodes with the capacitive electronics in order to eliminate all the undesirable capacitances to obtain a tactile capacitive slab and of position detection in the space of one or multiple objects with minimal error.
  • Another object of the invention is to introduce new functionalities depending on how a portable apparatus comprising a capacitive sensing device is maintained.
  • Another object of the invention is a new arrangement and / or form of electrodes for the improvement of the object detection.
  • a human-machine interface device having a transparent detection zone and an access zone, said device comprising:
  • the conductive connection tracks are arranged at least partially sandwiched between a second and a third conductive surfaces used as second and third guards for these conductive connection tracks.
  • the device according to the invention comprises conductive material connecting tracks for connecting the conductive connection tracks to electrodes of the electrode surface; when a connecting track runs along at least one electrode on the detection surface, this connecting track is made of transparent material and positioned between at least two electrodes.
  • this link track is positioned between the second and third guards.
  • the connecting tracks are at the end of the flanges, they are all made between two electrodes.
  • these connecting tracks are sandwiched between guards, that is to say there is a guard below and another above, these two guards being preferably at the same potential , in particular by electrical connection between them. They are preferably at the same potential as the first guard, especially by link electrically between them. It can therefore be envisaged that at least one of the second and third conductive surfaces is at the same guard potential as the first conductive surface.
  • the present invention makes it possible to greatly improve the accuracy (linearity, etc.) of the measurement of the position of the object (s) in contact ("touch") or in the vicinity ("hovering") of the detection surface that can be detected. to be a slab of a device.
  • Non-transparent electrodes may also be placed in the access area.
  • one of the second and third conductive surfaces is an extension of the first conductive surface.
  • the first and second guards can constitute the same surface.
  • the extension of the first guard under the access zone may be in transparent material or not.
  • the electrodes and the guards are designed from indium oxide doped with tin ITO.
  • Other light-transparent materials such as, for example, aluminum-doped zinc oxide (AZO) or tin-doped cadmium oxide can also be used.
  • AZO aluminum-doped zinc oxide
  • tin-doped cadmium oxide can also be used.
  • the electrodes can be of different shapes, such as for example:
  • the guards are designed on the basis of a floating bridge technology.
  • the capacitive measurement is preferably of the self capacitance type, that is to say a measurement of the capacitance created between an electrode and the measurement object.
  • At least one electrode is disposed on the side of the device, outside said detection zone.
  • a detection on the edge of the panel can thus be used to make commands on the side of the portable device as a smartphone.
  • This electrode may be disposed in place of the third conductive surface serving as a guard.
  • a method implemented in an apparatus comprising a human-machine interface device as defined above.
  • the fingers disposed on the edges of the apparatus are detected and the functionalities of the display screen of the apparatus are modified according to the arrangement of the detected fingers. This allows to organize or lock icons of the display according to the position of the fingers maintaining a portable device for example.
  • the number and positioning of the fingers can be determined so as to identify the type of hand holding the apparatus.
  • an edge of the device can be used to detect any object displacement by means of electrodes of the electrode surface so as to trigger commands within the apparatus. This type of command may correspond to a virtual button replacing for example an electromechanical button placed on the edge of a device (volume adjustment, .).
  • a capacitive command is generated by detecting on the edge the movement of the thumb without necessarily having electrodes under this thumb.
  • This mode of implementation corresponds to a detection by edge effect.
  • Another object of the invention is achieved with a human-machine interface device as described previously or any other human-machine interface device not limited to the characteristics described above but comprising software and hardware means making it possible to detect, by example by means of capacitive electrodes, objects such as fingers for example, on the rim of the device.
  • This device may include a processing unit configured to:
  • the detecting objects on the edges of the upper face of the device in particular it may be the face comprising a transparent part making it possible to display a display screen,
  • these icons can be reorganized according to the positions of the holding fingers. For example, we can move icons that would be at least partially hidden by the fingers. So we can change the location and / or functionality of some icons.
  • the processing unit may be a microprocessor or microcontroller connected to an electronic capacitive sensing circuit and controlling software applications of the device or generally of an electronic device such as a mobile phone, tablet or other.
  • FIGS. 1a and 1b are diagrammatic views from above and in section of an apparatus according to the invention.
  • FIG. 2 is a schematic view of an electrode surface according to the prior art
  • FIG. 3 is a schematic view a little more detailed of an electrode surface having transparent tracks along the electrodes at the end according to the prior art
  • FIG. 4 is a schematic view of a slab according to the invention without transparent edge tracks
  • FIG. 5a is a schematic sectional view of a device according to the invention.
  • FIG. 5b is a simplified schematic view illustrating the arrangement of connection tracks connecting the electrodes to the connection tracks according to the invention.
  • FIG. 6 is a schematic view of a slab according to the invention with guards on the access zones;
  • FIG. 7 is a schematic view of a slab according to the invention with guards over the entire access area
  • FIG. 8 is a schematic view of a slab according to the invention with guards on the short side of the access area;
  • FIGS. 1a and 1b an AP apparatus according to the invention is seen. It can be a "smartphone” type phone or a digital tablet with a touch screen, a remote control, a notebook, ...
  • This AP device includes a detection surface SD which is the touch part under which is in particular a plane (flat or curved) of electrodes.
  • This detection surface SD comprises from the upper part, several layers of transparent material such as for example an external window VE,
  • electrodes E made of conductive transparent material such as tin-doped indium oxide (ITO),
  • guard G which is a layer of transparent conductive material such as tin-doped indium oxide (ITO), and
  • the electrodes and the guard are therefore under the detection surface and are transparent conductive material which has a high resistivity.
  • the access zone can be defined here as any zone between the screen and the outer pane corresponding to the non-detection surface.
  • FIG 2 we see a conventional structure of a slab 1 transparent touch operating with an electronic measuring 2 absolute capacity or said self.
  • a flexible sheet 3 is used to connect the slab 1 to the measurement electronics which may comprise a microcontroller or microprocessor associated with software and hardware means necessary to achieve absolute capacity measurement as in particular in the documents of the prior art.
  • the sensitive surface is equipped with a large number of transparent electrodes 4 made of ITO material which are often but not limited to rectangular shape. Each electrode 4 is connected to a connecting track 5 on the edge of the slab.
  • the edge of the slab being outside the surface of the display, the connection tracks 5 may be metallic and non-transparent.
  • the advantage of the metal is its low electrical resistivity, which allows the use of long and space-saving edge tracks (10 to 20 pm wide for example).
  • Figure 3 shows an example of a conventional trace of transparent tracks for connecting the electrodes to the edge.
  • connection tracks between the electrodes and the connection tracks 5 are transparent tracks, while the connection tracks 5 in the access area (slab - the transparent area) are metallic .
  • some transparent connection tracks 7 are located on the sensitive surface but outside the electrodes. That is to say, these transparent tracks are between the last electrodes of the top of the detection surface and the access area which is generally opaque.
  • This track arrangement increases the failure to detect the position of an object in these areas. Indeed the use of electrodes to the physical edge of the sensitive surface provides a more effective signal processing to determine the position of an object. The presence of a sensitive surface edge bonding track tends to complicate signal processing and degrade the detection accuracy of the object.
  • FIG. 5a shows the elements of FIG. 1b, but a new guard G2 is introduced above the connection tracks PT so that these connecting tracks are sandwiched between the guard G1 (corresponding to the guard G in FIG. 1b). ) and the guard G2 which are at the same guard potential, in particular electrically connected to each other.
  • These PT connection tracks can be covered with a dielectric then a metal layer (metal guard) or the transparent conductor layer ITO (transparent guard) connected to the guard potential by the flexible link CF.
  • these PT connection tracks can not create unwanted capacity measured by the electronics. They can not react to the presence of an object on the edge of the slab as in the example of Figures 2 and 3.
  • FIG. 5b shows an exemplary embodiment in which connection tracks PL make it possible to connect conductive connection tracks PT to electrodes E disposed on an electrode surface.
  • the electrodes are transparent in ITO material.
  • connection tracks PL are transparent when they are in the detection zone corresponding to the detection surface SD. They can be metallic in the access zone. In the access area, the connection tracks PT are arranged, without contact, sandwiched between a guard G2 below and a guard G3 above.
  • the guards G2 and G3 are preferably metallic, but may also be made of transparent ITO material.
  • the guard G2 may be an extension of the guard G1 provided for the electrodes E. According to the invention, it is intended to replace the guard G3 (placed above the connecting tracks) by electrodes (at least one) of measurement . Indeed, these electrodes like all others can play the role of guard for tracks located below them.
  • Electrodes arranged on the side of the device can be used mainly for edge detection, that is to say the object detection, as the fingers, disposed on the edge of the device.
  • Figure 6 shows the general solution in top view with the metal tracks 5 located between two guards G1 and G2. Any track on the edges has been removed.
  • the flexible connectors CF are also arranged between G1 and G2. All the transparent tracks 8 in the transparent zone 6 are located between two rows of electrodes.
  • the apparatus it is possible, for example, to detect the four fingers (at least two fingers) on one side of the apparatus and the thumb on the other side to deduce whether the apparatus is held in the left or right hand. .
  • buttons for example, you can correctly place a button (icon) in front of the thumb of the hand that carries the device, clear the icons located under or too close to the other four fingers to facilitate control with the other hand.
  • the capacitive detection of the fingers or any object near the slab can advantageously be done with individual electrodes shielded on the screen side by a guard whose potential is substantially equal to that of the electrodes because the measured capacitances are very low (up to a few fF). ) and any unwanted parasitic leakage capability would degrade the detection.
  • the electronics manages each electrode to measure each inter-electrode-object capacitance.
  • the detected objects are referenced to the ground potential of the electronics.
  • Electrodes can also be placed on the sides of the portable device to increase nearby object detection capabilities. We can also detect the shape of the object such as a hand to know in which direction (front or back) the device is held in the hand.
  • the device is placed on a flat surface such as a table or housed in a pocket of a garment.
  • Figure 7 is a schematic front view of a device according to the invention. It can be seen that the guard G2 is a frame running around the transparent surface 6. The guard G1, not visible in FIG. 6, is disposed in a plane parallel to the guard G2 so as to frame metal tracks.
  • the electrode surface is a rectangle for which the connecting tracks 9 of transparent material connect the electrodes from the surface to access areas 10 and 11 on the short sides of the rectangle. Guards G1 and G2 are sandwiched in these access areas. In each access zone there is an integrated circuit IC1, IC2, connected to the connection tracks coming from the nearest electrodes.
  • the tracks can be metallic between the transparent surface and the integrated circuits.
  • This solution avoids placing conductive connection tracks on long sides that are used most of the time to maintain the device.
  • the advantage is the removal of long tracks on the vertical sides. Still some conductive connection tracks 12 are used on the vertical sides so that the two integrated circuits can communicate with each other. But these tracks do not need to be kept. Both integrated circuits can use the same guard potential.
  • the integrated circuit IC2 is then connected to a processing unit via the floss CF.
  • the electrodes preferably cover as much as possible the sensitive surface of the slab.
  • the concave electrodes nested inside each other can make it possible to reduce the frank fracture defect during the passage of an object from one electrode to the other or to add information by playing on the evolutive geometry of each electrode relative to the position of the object.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Position Input By Displaying (AREA)
  • User Interface Of Digital Computer (AREA)
  • Telephone Function (AREA)

Abstract

The invention relates to a man-machine interface device exhibiting a transparent detection zone and an access zone, this device comprising: - a surface of electrodes made of a material which is transparent and conducting in the detection zone, - conducting connection tracks disposed in the access zone and connected to the surface of electrodes, - a first conducting surface made of a transparent material, present in the transparent zone, and used as guard for the electrodes surface. The conducting connection tracks are disposed sandwich-like between a second and a third conducting surface used as second and third guards for these conducting connection tracks. The device also comprises linking tracks made of a transparent conducting material for linking the conducting connection tracks to electrodes of the electrodes surface, these linking tracks being: - positioned between the electrodes when these linking tracks are situated on the detection surface, and - positioned between the second and third guards when these linking tracks are situated in the access zone.

Description

" Dispositif de détection capacitive avec arrangement de pistes de liaison, et procédé mettant en œuvre un tel dispositif."  "Capacitive sensing device with arrangement of connecting tracks, and method using such a device."
La présente invention se rapporte à un dispositif de mesure capacitive entre un objet et un plan d'électrodes. Elle s'applique notamment dans le domaine général des surfaces tactiles capacitives 2D et détection capacitive 3D utilisées pour les commandes d'interface homme machine. De plus en plus d'appareils de communication et de travail utilisent une interface de commande tactile comme un pad ou un écran . On peut citer par exemple les téléphones mobiles, Smartphones, notebooks électroniques, PC, souris, dalles, écrans géants The present invention relates to a capacitive measuring device between an object and an electrode plane. It applies in particular in the general field of 2D capacitive touch surfaces and 3D capacitive sensing used for human machine interface commands. More and more communication and work devices use a touch control interface such as a pad or screen. Examples include mobile phones, smartphones, electronic notebooks, PCs, mice, slabs, giant screens
Un grand nombre de ces interfaces utilisent les technologies capacitives. La surface tactile est équipée d'électrodes conductrices reliée à des moyens électroniques permettant de mesurer la variation des capacités crées entre des électrodes et l'objet à détecter pour effectuer une commande.  Many of these interfaces use capacitive technologies. The touch surface is equipped with conductive electrodes connected to electronic means making it possible to measure the variation of the capacitances created between the electrodes and the object to be detected in order to carry out a command.
Les techniques capacitives actuelles, utilisent le plus souvent deux couches d'électrodes conductrices en forme de ligne et de colonnes. L'électronique mesure les capacités de couplage qui existent entre ces lignes et colonnes. Lorsqu'un doigt est très proche de la surface active, les capacités de couplage à proximité du doigt sont modifiées et l'électronique peut ainsi localiser la position 2D (XY) dans le plan de la surface active. Current capacitive techniques, most often use two layers of conductive electrodes in the form of lines and columns. Electronics measure the coupling capabilities that exist between these lines and columns. When a finger is very close to the active surface, the coupling capabilities near the finger are changed and the electronics can thus locate the position 2D (XY) in the plane of the active surface.
Cette technologie permet de détecter la présence et la position du doigt au travers d'un diélectrique. Cette technique a l'avantage d'obtenir une très bonne résolution sur la localisation dans le plan XY de la surface sensible d'un ou de plusieurs doigts. Ces techniques ont toutefois l'inconvénient de ne détecter qu'un contact de l'objet voire une détection à très proche mais ne dépassant pas quelques mm. Il est difficile d'effectuer des commandes tactiles avec des gants épais (gant de ski, motard...), avec des ongles longs ou un stylet. La faible sensibilité des électrodes capacitives ne permet pas de déclencher une commande au travers de diélectrique épais.  This technology makes it possible to detect the presence and the position of the finger through a dielectric. This technique has the advantage of obtaining a very good resolution on the location in the XY plane of the sensitive surface of one or more fingers. However, these techniques have the disadvantage of only detecting a contact of the object or even a detection very close but not exceeding a few mm. It is difficult to make tactile commands with thick gloves (ski glove, biker ...), with long nails or a stylus. The low sensitivity of the capacitive electrodes does not allow triggering a command through thick dielectric.
Il est aussi impossible de détecter la position et le nombre de doigts tenant l'appareil portable pour en déduire le type de main (gauche ou droite et le possible écrantage de l'écran. Il existe aussi des techniques plus récentes permettant de mesurer la capacité absolue crée entre les électrodes et l'objet à détecter. Cette technique est similaire aux techniques dites self capacitance. On peut citer par exemple le brevet FR2756048 : Pont de mesure capacitif flottant, le brevet FR2893711 : Dispositif et procédé de mesure capacitive par pont flottant ou le brevet FR2844349 : Détecteur capacitif de proximité. Ces techniques permettent d'obtenir une mesure de la capacité inter électrode- objet de très haute résolution et de détecter par exemple un doigt à plusieurs cm voire à 10cm de distance. La détection se fait dans l'espace en 3 dimensions XYZ mais aussi en tactile sur le plan XY. On peut cette fois déclencher une commande avec un gant ou au travers de tout type de diélectrique épais. Ces techniques sont possibles en utilisant donc une électronique de mesure de capacité absolue afin de pouvoir détecter le plus loin possible la position du ou des objets dans l'espace proche de la surface active (au- dessus et en périphérie de la dalle). L'idéal étant de recouvrir toute la surface de la dalle d'électrodes capacitives. Ces électrodes sont reliées à une électronique pour convertir la capacité créée entre chaque électrode et le ou les objets à détecter. It is also impossible to detect the position and the number of fingers holding the portable device to deduce the type of hand (left or right and the possible screening of the screen. There are also more recent techniques for measuring the absolute capacitance created between the electrodes and the object to be detected. This technique is similar to so-called self capacitance techniques. One can cite for example the patent FR2756048: Floating capacitive measuring bridge, the patent FR2893711: Device and method of capacitive measurement by floating bridge or the patent FR2844349: Capacitive proximity sensor. These techniques make it possible to obtain a measurement of the inter-electrode-object capacitance of very high resolution and to detect, for example, a finger at several cm or even at a distance of 10 cm. Detection is done in 3-dimensional space XYZ but also in touch on the XY plane. This time we can trigger a command with a glove or through any type of thick dielectric. These techniques are possible by using a measurement electronics absolute capacity to detect as far as possible the position of the object or objects in the space near the active surface (above and around the slab). The ideal is to cover the entire surface of the slab of capacitive electrodes. These electrodes are connected to electronics to convert the capacitance created between each electrode and the object (s) to be detected.
Pour effectuer une mesure absolue de ces capacités, il est nécessaire d'éliminer toutes les capacités parasites susceptibles d'apparaître en dehors de la zone de détection c'est-à-dire entre les électrodes et le circuit électronique comme par exemple celle crée par la piste de liaison de chaque électrode, le dessous des électrodes, la limande de liaison entre la dalle et l'électronique, l'entrée du circuit électronique....  To make an absolute measurement of these capacities, it is necessary to eliminate all parasitic capacitances likely to appear outside the detection zone, that is to say between the electrodes and the electronic circuit, for example that created by the connecting track of each electrode, the underside of the electrodes, the bonding strip between the slab and the electronics, the input of the electronic circuit ....
Une grande partie de ces capacités parasites peuvent être supprimées par l'utilisation d'une garde dont son potentiel est sensiblement de même valeur que celui des électrodes comme décrit dans le brevet de Rozière FR2756048.  A large part of these parasitic capacitances can be suppressed by the use of a guard whose potential is substantially of the same value as that of the electrodes as described in Rozière patent FR2756048.
Toutefois, la détection dans un volume à grande distance a pour inconvénient la détection de tout objet à proximité du panel mais en dehors de sa surface. Ceci peut limiter les possibilités de commande ou réduire la surface visible du panel ou déclencher intempestivement des commandes Pour cela, on peut par exemple s'assurer que toute la surface de la dalle ne soit équipée que d'électrodes sans liaison électrique apparente afin d'éviter que le ou les objets environnants comme par exemple l'extrémité des doigts de la main qui maintiennent l'appareil portable ne soit détectée comme objets désirés. However, the detection in a large distance volume has the disadvantage of detecting any object near the panel but outside its surface. This can limit the control possibilities or reduce the visible surface of the panel or untimely trigger commands For this, we can for example ensure that the entire surface of the slab is only equipped with electrodes without apparent electrical connection to prevent the surrounding object or objects such as the end of the fingers of the hand which maintain the portable device is detected as desired objects.
Une solution consiste à utiliser une dalle capacitive multicouche comme par exemple un PCB (« Printed Circuit Board ») . Les électrodes capacitives sont déposées sur la surface extérieure côté objet à détecter et toutes les pistes de liaison sont situées sous les électrodes au niveau d'une couche inférieure. Ces pistes sont reliées aux électrodes grâce à des trous métallisés via la couche des électrodes. Toutes les pistes sont connectées à l'électronique mais sont gardées jusqu'à la connexion (une couche de garde est située au-dessous des pistes de liaison). Ainsi, les électrodes jouent leur rôle de garde vis-à-vis des pistes en utilisant une électronique par exemple flottante comme décrit dans le brevet FR2756048.  One solution is to use a multilayer capacitive slab such as a PCB ("Printed Circuit Board"). The capacitive electrodes are deposited on the outer object-side surface to be detected and all the connecting tracks are located below the electrodes at a lower layer. These tracks are connected to the electrodes through metallized holes via the electrode layer. All tracks are connected to the electronics but are kept until the connection (a guard layer is located below the connecting tracks). Thus, the electrodes play their guarding role vis-à-vis the tracks using an electronic floating example as described in the patent FR2756048.
Une difficulté apparaît tout de même pour intégrer cette fonction dans un téléphone, Smartphone, GPS, écran tactile ou tout appareil équipé de ce type de surface tactile et d'un affichage. A difficulty still appears to integrate this function in a phone, smartphone, GPS, touch screen or any device equipped with this type of touch surface and a display.
Ces surfaces d'électrodes capacitives doivent être équipées d'électrodes transparentes afin de pouvoir laisser passer la lumière émise par l'affichage se trouvant sous la dalle. En général, les électrodes conductrices d'électricité sont en ITO (Indium tin oxide). Ce matériau possède de bonnes propriétés optiques et électriques. Pour des problèmes techniques, de process de fabrication et de qualité optiques, il n'est pas possible d'utiliser des trous métallisés et toutes les électrodes capacitives doivent être reliées au circuit extérieur à la surface sensible uniquement à l'aide de piste transparente située sur la même couche que ces électrodes. These capacitive electrode surfaces must be equipped with transparent electrodes in order to let the light emitted by the display under the slab pass. In general, electrically conductive electrodes are made of ITO (Indium tin oxide). This material has good optical and electrical properties. For technical, manufacturing and optical quality problems, it is not possible to use metallized holes and all the capacitive electrodes must be connected to the external circuit at the sensitive surface only by means of a transparent track located on the same layer as these electrodes.
La présente invention a pour objet l'optimisation de la disposition des pistes de liaison des électrodes à l'électronique capacitive afin d'éliminer toutes les capacités indésirables pour obtenir une dalle capacitive tactile et de détection de position dans l'espace d'un ou plusieurs objets avec un minimum d'erreur. Un autre objet de l'invention est d'introduire de nouvelles fonctionnalités en fonction de la façon dont un appareil portable comprenant un dispositif de détection capacitive est maintenu. The object of the present invention is to optimize the arrangement of the connection tracks of the electrodes with the capacitive electronics in order to eliminate all the undesirable capacitances to obtain a tactile capacitive slab and of position detection in the space of one or multiple objects with minimal error. Another object of the invention is to introduce new functionalities depending on how a portable apparatus comprising a capacitive sensing device is maintained.
Un autre objet de l'invention est une nouvelle disposition et/ou forme des électrodes pour l'amélioration de la détection d'objet.  Another object of the invention is a new arrangement and / or form of electrodes for the improvement of the object detection.
On atteint au moins l'un des objectifs avec un dispositif d'interface homme-machine présentant une zone de détection transparente et une zone d'accès, ce dispositif comprenant : At least one of the objectives is achieved with a human-machine interface device having a transparent detection zone and an access zone, said device comprising:
- une surface d'électrodes en matériau transparent conducteur dans la zone de détection,  an electrodes surface made of conductive transparent material in the detection zone,
- des pistes de connexion conductrices disposées dans la zone d'accès et connectées à la surface d'électrodes,  conductive connection tracks arranged in the access zone and connected to the electrode surface,
- une première surface conductrice en matériau transparent dans la zone transparente, utilisée comme garde pour la surface d'électrodes.  - A first conductive surface of transparent material in the transparent area, used as a guard for the electrode surface.
Selon l'invention, les pistes de connexion conductrices sont disposées au moins partiellement en sandwich entre une seconde et une troisième surfaces conductrices utilisées comme seconde et troisième gardes pour ces pistes de connexion conductrices. En outre, le dispositif selon l'invention comprend des pistes de liaison en matériau conducteur pour relier les pistes de connexion conductrices à des électrodes de la surface d'électrodes ; lorsqu'une piste de liaison longe au moins une électrode sur la surface de détection, cette piste de liaison est en matériau transparente et positionnée entre au moins deux électrodes.  According to the invention, the conductive connection tracks are arranged at least partially sandwiched between a second and a third conductive surfaces used as second and third guards for these conductive connection tracks. In addition, the device according to the invention comprises conductive material connecting tracks for connecting the conductive connection tracks to electrodes of the electrode surface; when a connecting track runs along at least one electrode on the detection surface, this connecting track is made of transparent material and positioned between at least two electrodes.
De préférence, lorsqu'une piste de liaison est située dans la zone d'accès, cette piste de liaison est positionnée entre les seconde et troisième gardes.  Preferably, when a link track is located in the access area, this link track is positioned between the second and third guards.
Avec le dispositif selon l'invention, on réduit l'influence des pistes de liaison dans la mesure de la capacité. Dans la zone de détection, on évite que les pistes de liaison se trouvent en terminaison des rebords, elles sont toutes réalisées entre deux électrodes. Dans la zone d'accès, ces pistes de liaison sont disposées en sandwich entre des gardes, c'est-à-dire il y a une garde en-dessous et une autre au-dessus, ces deux gardes étant de préférence au même potentiel, notamment par liaison électrique entre elles. Elles sont de préférence au même potentiel que la première garde, notamment par liaison électriq ue entre elles. On peut donc envisager q u'au moins l'une des deuxième et troisième surfaces cond uctrices est à un même potentiel de garde que la première surface cond uctrice. With the device according to the invention, the influence of the connecting tracks is reduced in the measurement of the capacity. In the detection zone, it is avoided that the connecting tracks are at the end of the flanges, they are all made between two electrodes. In the access area, these connecting tracks are sandwiched between guards, that is to say there is a guard below and another above, these two guards being preferably at the same potential , in particular by electrical connection between them. They are preferably at the same potential as the first guard, especially by link electrically between them. It can therefore be envisaged that at least one of the second and third conductive surfaces is at the same guard potential as the first conductive surface.
La présente invention permet d 'améliorer fortement la précision (linéarité...) de la mesure de la position d u ou des objets en contact (« touch ») ou à proximité (« hovering ») de la su rface de détection q ui peut être une dalle d 'un appareil .  The present invention makes it possible to greatly improve the accuracy (linearity, etc.) of the measurement of the position of the object (s) in contact ("touch") or in the vicinity ("hovering") of the detection surface that can be detected. to be a slab of a device.
Seules les électrodes et les pistes présentes su r la surface de détection définie comme sensible peuvent réag ir à la présence d 'un objet. Ainsi, il est beaucoup plus facile et robuste d 'effectuer une calibration de la dalle et de s'affranchir de tout objet parasite comme par exemple les doigts q ui maintiennent la dalle.  Only the electrodes and tracks present on the detection surface defined as sensitive can react to the presence of an object. Thus, it is much easier and more robust to perform a calibration of the slab and to overcome any parasitic object such as the fingers that maintain the slab.
Ces doigts peuvent par contre être détectés avec précision g râce aux électrodes car cel les-ci, en particul ier celles se trouvant proches des bords de la dalle, sont sensibles aux effets de bords. Il est donc possible de déterminer la position d 'objet à l'extérieur de la surface sensible. On peut ainsi détecter la position des doigts et de la main (ou tout autre objet) tenant un appareil portable (Smartphone, télécommande, tablette,.... ) . Des électrodes non transparentes peuvent également être placées dans la zone d 'accès.  These fingers, however, can be accurately detected by means of the electrodes because these, especially those close to the edges of the slab, are sensitive to edge effects. It is therefore possible to determine the object position outside the sensitive surface. One can thus detect the position of the fingers and the hand (or any other object) holding a portable device (smartphone, remote control, tablet, ....). Non-transparent electrodes may also be placed in the access area.
De préférence, l'une des deuxième et troisième surfaces cond uctrices est un prolongement de la première surface cond uctrice. Par exemple, la première et la seconde gardes peuvent constituer une même surface. L'extension de la première garde sous la zone d 'accès peut être en matériau transparent ou non . Preferably, one of the second and third conductive surfaces is an extension of the first conductive surface. For example, the first and second guards can constitute the same surface. The extension of the first guard under the access zone may be in transparent material or not.
Selon l'invention, les électrodes et les gardes sont conçues à partir de l'oxyde d 'ind ium dopé à l'étain ITO. D'autres matériaux transparents à la lumière comme par exemple l'oxyde de zinc dopé à l'aluminium (AZO) ou de l'oxyde de cadmium dopé à l'étain peuvent aussi être util isés. According to the invention, the electrodes and the guards are designed from indium oxide doped with tin ITO. Other light-transparent materials such as, for example, aluminum-doped zinc oxide (AZO) or tin-doped cadmium oxide can also be used.
Selon l'invention, les électrodes peuvent être de d ifférentes formes, tel les q ue par exemple : According to the invention, the electrodes can be of different shapes, such as for example:
- de forme rectangu laire,  - rectangular shape,
- de forme triang ulaire, ou  - of triangular shape, or
- de forme concave. Selon une caractéristique avantageuse, les gardes sont conçues sur la base d'une technologie à pont flottant. Par ailleurs, la mesure capacitive est de préférence de type self capacitance, c'est-à-dire une mesure de la capacité créée entre une électrode et l'objet de mesure. - concave shape. According to an advantageous characteristic, the guards are designed on the basis of a floating bridge technology. Moreover, the capacitive measurement is preferably of the self capacitance type, that is to say a measurement of the capacitance created between an electrode and the measurement object.
Selon une caractéristique avantageuse de l'invention, au moins une électrode est disposée sur le côté du dispositif, hors ladite zone de détection.According to an advantageous characteristic of the invention, at least one electrode is disposed on the side of the device, outside said detection zone.
Une détection sur le bord du panel peut ainsi servir à effectuer des commandes sur le côté de l'appareil portable comme un Smartphone. Cette électrode peut être disposée en lieu et place de la troisième surface conductrice servant de garde. A detection on the edge of the panel can thus be used to make commands on the side of the portable device as a smartphone. This electrode may be disposed in place of the third conductive surface serving as a guard.
On peut par exemple régler le niveau sonore de son téléphone en glissant le pouce sur le côté du téléphone sans avoir besoin d'utiliser directement la surface de détection. Cet avantage permet de remplacer les boutons électromécaniques souvent présents sur un côté du téléphone.  For example, you can adjust the sound level of your phone by sliding your thumb on the side of the phone without having to use the sensor surface directly. This advantage allows to replace electromechanical buttons often present on one side of the phone.
Selon un autre aspect de l'invention, il est proposé un procédé mis en œuvre dans un appareil comprenant un dispositif d'interface homme-machine tel que défini ci-dessus. Selon l'invention, on détecte les doigts disposés sur les bords de l'appareil et on modifie les fonctionnalités de l'écran d'affichage de l'appareil en fonction de la disposition des doigts détectés. Cela permet d'organiser ou verrouiller des icônes de l'affichage en fonction de la position des doigts maintenant un appareil portable par exemple. On peut avantageusement exploiter un ou plusieurs doigts de commande en bord de dalle et hors surface sensible pour effectuer une commande. According to another aspect of the invention, there is provided a method implemented in an apparatus comprising a human-machine interface device as defined above. According to the invention, the fingers disposed on the edges of the apparatus are detected and the functionalities of the display screen of the apparatus are modified according to the arrangement of the detected fingers. This allows to organize or lock icons of the display according to the position of the fingers maintaining a portable device for example. One can advantageously operate one or more control fingers slab edge and off sensitive surface to perform a command.
Selon l'invention, on peut déterminer le nombre et le positionnement des doigts de façon à identifier le type de main tenant l'appareil. On peut identifier ainsi la main gauche ou la main droite qui tient l'appareil portable. Ce qui permet notamment de repositionner certaines commandes sur l'écran d'affichage de l'appareil suivant qu'il s'agisse d'une main gauche ou d'une main droite tenant l'appareil. Suivant l'invention, en absence de détection de doigts sur les bords, on peut alors identifier si l'appareil est posé sur son support côté surface sensible ou pas. Selon l'invention, on peut utiliser un bord du dispositif pour détecter tout déplacement d'objet au moyen d'électrodes de la surface d'électrodes de façon à enclencher des commandes au sein de l'appareil . Ce type de commande peut correspondre à un bouton virtuel remplaçant par exemple un bouton électromécanique placé sur le bord d'un appareil (réglage du volume,....). Par exemple, on peut considérer que l'on génère une commande capacitive en détectant sur le bord le déplacement du pouce sans obligatoirement avoir des électrodes sous ce pouce. Ce mode de mise en œuvre correspond à une détection par effet de bord. Un autre objet de l'invention est atteint avec un dispositif d'interface homme machine tel que décrit précédemment ou tout autre dispositif d'interface homme machine non limité aux caractéristiques décrites ci-dessus mais comprenant des moyens logiciels et matériel permettant de détecter, par exemple au moyen d'électrodes capacitives, des objets tels que des doigts par exemple, sur le rebord du dispositif. According to the invention, the number and positioning of the fingers can be determined so as to identify the type of hand holding the apparatus. We can identify the left hand or the right hand holding the portable device. This allows in particular to reposition some commands on the display screen of the device depending on whether it is a left hand or a right hand holding the device. According to the invention, in the absence of detection of fingers on the edges, it is then possible to identify whether the apparatus is placed on its support on the sensitive surface side or not. According to the invention, an edge of the device can be used to detect any object displacement by means of electrodes of the electrode surface so as to trigger commands within the apparatus. This type of command may correspond to a virtual button replacing for example an electromechanical button placed on the edge of a device (volume adjustment, ....). For example, it can be considered that a capacitive command is generated by detecting on the edge the movement of the thumb without necessarily having electrodes under this thumb. This mode of implementation corresponds to a detection by edge effect. Another object of the invention is achieved with a human-machine interface device as described previously or any other human-machine interface device not limited to the characteristics described above but comprising software and hardware means making it possible to detect, by example by means of capacitive electrodes, objects such as fingers for example, on the rim of the device.
Ce dispositif peut comprendre une unité de traitement configurée pour :  This device may include a processing unit configured to:
- détecter des objets sur les bords de la face supérieure du dispositif, en particulier il peut s'agir de la face comprenant une partie transparente permettant de visualiser un écran d'affichage,  detecting objects on the edges of the upper face of the device, in particular it may be the face comprising a transparent part making it possible to display a display screen,
identifier le positionnement exact de ces objets, notamment au moyen d'algorithme de reconnaissance de forme ou autre,  identify the exact positioning of these objects, in particular by means of shape recognition algorithm or other,
- commander une application de gestion de l'affichage de l'écran de façon à modifier l'affichage en fonction des objets détectés.  - Control a screen display management application so as to change the display according to the detected objects.
En particulier, si les objets sont des doigts de maintien du dispositif, et si l'écran d'affichage comporte des icônes, on peut réorganiser ces icônes en fonction des positions des doigts de maintien. On peut par exemple déplacer des icônes qui seraient au moins partiellement cachés par les doigts. On peut donc modifier l'emplacement et/ou la fonctionnalité de certains icônes.  In particular, if the objects are holding fingers of the device, and if the display screen has icons, these icons can be reorganized according to the positions of the holding fingers. For example, we can move icons that would be at least partially hidden by the fingers. So we can change the location and / or functionality of some icons.
On peut par ailleurs, mettre en œuvre un algorithme pour distinguer les différents doigts et déterminer s'il s'agit de la main gauche ou la main droite. On peut également identifier s'il s'agit d'un pouce. Cela peut se faire par analyse de l'emplacement des doigts, de leur forme (les mesures capacitives en trois dimensions permettent notamment d'estimer la forme des objets) et de leur taille. L'unité de traitement peut être un microprocesseur ou microcontrôleur connecté à un circuit électronique de détection capacitive et contrôlant des applications logicielles du dispositif ou d'une façon générale d'un appareil électronique tel un téléphone portable, une tablette ou autre. D'autres avantages et caractéristiques de l'invention apparaîtront à l'examen de la description détaillée d'un mode de mise en œuvre nullement limitatif, et des dessins annexés, sur lesquels : We can also implement an algorithm to distinguish the different fingers and determine whether it is the left hand or the hand right. One can also identify if it is an inch. This can be done by analyzing the location of the fingers, their shape (three-dimensional capacitive measurements allow to estimate the shape of the objects) and their size. The processing unit may be a microprocessor or microcontroller connected to an electronic capacitive sensing circuit and controlling software applications of the device or generally of an electronic device such as a mobile phone, tablet or other. Other advantages and characteristics of the invention will appear on examining the detailed description of a non-limiting embodiment, and the appended drawings, in which:
- les figures la et lb sont des vues schématiques de dessus et en coupe d'un appareil selon l'invention ; FIGS. 1a and 1b are diagrammatic views from above and in section of an apparatus according to the invention;
- la figure 2 est une vue schématique d'une surface d'électrodes selon l'art antérieur ;  FIG. 2 is a schematic view of an electrode surface according to the prior art;
- la figure 3 est une vue schématique un peu plus détaillée d'une surface d'électrodes disposant de pistes transparentes le long des électrodes à l'extrémité selon l'art antérieur ;  FIG. 3 is a schematic view a little more detailed of an electrode surface having transparent tracks along the electrodes at the end according to the prior art;
- la figure 4 est une vue schématique d'une dalle selon l'invention sans pistes transparentes de bord ;  - Figure 4 is a schematic view of a slab according to the invention without transparent edge tracks;
- la figure 5a est une vue schématique en coupe d'un dispositif selon l'invention ;  - Figure 5a is a schematic sectional view of a device according to the invention;
- la figure 5b est une vue schématique simplifié illustrant la disposition de pistes de liaison reliant les électrodes aux pistes de connexion selon l'invention ;  FIG. 5b is a simplified schematic view illustrating the arrangement of connection tracks connecting the electrodes to the connection tracks according to the invention;
- la figure 6 est une vue schématique d'une dalle selon l'invention avec des gardes sur les zones d'accès ;  FIG. 6 is a schematic view of a slab according to the invention with guards on the access zones;
- la figure 7 est une vue schématique d'une dalle selon l'invention avec des gardes sur toute la zone d'accès ;  - Figure 7 is a schematic view of a slab according to the invention with guards over the entire access area;
- la figure 8 est une vue schématique d'une dalle selon l'invention avec des gardes sur le petit côté de la zone d'accès ; et  - Figure 8 is a schematic view of a slab according to the invention with guards on the short side of the access area; and
- les figures 9 à 12 sont des vues schématiques illustrant différentes formes géométriques d'électrodes. De façon générale, sur les figures la et lb, on voit un appareil AP selon l'invention. Il peut s'agir d'un téléphone de type « smartphone » ou d'une tablette numérique dotée d'un écran tactile, une télécommande, un notebook,... Cet appareil AP comprend une surface de détection SD qui est la partie tactile sous laquelle se trouve notamment un plan (plat ou courbé) d'électrodes. Cette surface de détection SD comprend depuis la partie supérieure, plusieurs couches en matériau transparent telles que par exemple une vitre externe VE, - Figures 9 to 12 are schematic views illustrating different geometric shapes of electrodes. Generally speaking, in FIGS. 1a and 1b, an AP apparatus according to the invention is seen. It can be a "smartphone" type phone or a digital tablet with a touch screen, a remote control, a notebook, ... This AP device includes a detection surface SD which is the touch part under which is in particular a plane (flat or curved) of electrodes. This detection surface SD comprises from the upper part, several layers of transparent material such as for example an external window VE,
- un film anti-débris FAD,  - a FAD anti-debris film,
une colle transparente CT, et  a transparent CT glue, and
un polariseur P,  a polarizer P,
des électrodes E en matériau transparent conducteur tel que l'oxyde d'indium dopé à l'étain (ITO),  electrodes E made of conductive transparent material such as tin-doped indium oxide (ITO),
- un support S en verre, en PET ou tout autre diélectrique, pour électrodes,  a support S made of glass, PET or any other dielectric, for electrodes,
une garde G qui est une couche en matériau transparent conducteur tel que l'oxyde d'indium dopé à l'étain (ITO), et  a guard G which is a layer of transparent conductive material such as tin-doped indium oxide (ITO), and
un écran EC d'affichage qui doit être visible de l'extérieur depuis la vitre externe VE.  an EC display screen which must be visible from the outside from the external window VE.
Les électrodes et la garde se trouvent donc sous la surface de détection et sont en matériau transparent conducteur qui présente une haute résistivité.  The electrodes and the guard are therefore under the detection surface and are transparent conductive material which has a high resistivity.
On distingue également une surface de non détection SND qui entoure dans le cas d'espèce la surface de détection SD. Cette surface est généralement opaque de l'extérieur et ne comporte pas d'électrodes mais des pistes de connexion PT et des liaisons flexibles CF qui sont métalliques donc de faible résistivité. La zone d'accès peut être définie ici comme toute zone entre l'écran et la vitre externe correspondant à la surface de non détection.  There is also a non-detection surface SND which surrounds in this case the detection surface SD. This surface is generally opaque from the outside and does not include electrodes but PT connection tracks and flexible links CF which are metallic and therefore of low resistivity. The access zone can be defined here as any zone between the screen and the outer pane corresponding to the non-detection surface.
Sur la figure 2 on voit une structure classique d'une dalle 1 tactile transparente fonctionnant avec une électronique 2 de mesure de capacité absolue ou dite self. On utilise une nappe souple 3 pour relier la dalle 1 à l'électronique de mesure qui peut comprendre un microcontrôleur ou microprocesseur associé à des moyens logiciels et matérielles nécessaires pour réaliser de la mesure de capacité absolue comme notamment dans les documents de l'art antérieur. In Figure 2 we see a conventional structure of a slab 1 transparent touch operating with an electronic measuring 2 absolute capacity or said self. A flexible sheet 3 is used to connect the slab 1 to the measurement electronics which may comprise a microcontroller or microprocessor associated with software and hardware means necessary to achieve absolute capacity measurement as in particular in the documents of the prior art.
La surface sensible est équipée d'un grand nombre d'électrodes 4 transparentes en matériau ITO qui sont souvent mais de façon non limitative de forme rectangulaire. Chaque électrode 4 est reliée à une piste de connexion 5 sur le bord de la dalle. Le bord de la dalle étant en dehors de la surface de l'affichage, les pistes de connexion 5 peuvent être métalliques et non transparente. L'avantage du métal est sa faible résistivité électrique, ce qui permet d'utiliser des pistes de bord longues et peu encombrantes (10 à 20 pm de large par exemple).  The sensitive surface is equipped with a large number of transparent electrodes 4 made of ITO material which are often but not limited to rectangular shape. Each electrode 4 is connected to a connecting track 5 on the edge of the slab. The edge of the slab being outside the surface of the display, the connection tracks 5 may be metallic and non-transparent. The advantage of the metal is its low electrical resistivity, which allows the use of long and space-saving edge tracks (10 to 20 pm wide for example).
La figure 3 montre un exemple de tracé classique de pistes transparentes pour relier les électrodes sur le bord . Dans la zone transparente 6 également nommée surface sensible, des pistes de liaison entre les électrodes et les pistes de connexion 5 sont des pistes transparentes, alors que les pistes de connexion 5 dans la zone d'accès (dalle - la zone transparente) sont métalliques. Figure 3 shows an example of a conventional trace of transparent tracks for connecting the electrodes to the edge. In the transparent area 6 also called sensitive surface, connection tracks between the electrodes and the connection tracks 5 are transparent tracks, while the connection tracks 5 in the access area (slab - the transparent area) are metallic .
Sur cette figure on peut voir que certaines pistes de liaison transparentes 7 sont situées sur la surface sensible mais à l'extérieur des électrodes. C'est-à-dire que ces pistes transparentes se trouvent entre les dernières électrodes du haut de la surface de détection et la zone d'accès qui est généralement opaque. Cette disposition de pistes augmente le défaut de détection de la position d'un objet dans ces zones. En effet l'utilisation d'électrodes jusqu'au bord physique de la surface sensible permet d'obtenir un traitement du signal plus efficace pour déterminer la position d'un objet. La présence d'une piste de liaison en bord de surface sensible a tendance à compliquer le traitement du signal et à dégrader la précision de détection de l'objet.  In this figure it can be seen that some transparent connection tracks 7 are located on the sensitive surface but outside the electrodes. That is to say, these transparent tracks are between the last electrodes of the top of the detection surface and the access area which is generally opaque. This track arrangement increases the failure to detect the position of an object in these areas. Indeed the use of electrodes to the physical edge of the sensitive surface provides a more effective signal processing to determine the position of an object. The presence of a sensitive surface edge bonding track tends to complicate signal processing and degrade the detection accuracy of the object.
Sur la figure 4, on voit une dalle selon l'invention. Les pistes transparentes de bords 7 de la figure 3 ont disparu, elles ont été déplacées vers l'intérieur en des pistes de liaison 8 entre deux rangées d'électrodes. Ainsi, les électrodes de la dernière rangée constituent la frontière avec la zone d'accès autour de la zone d'électrodes. La figure 5a reprend les éléments de la figure lb, mais on introduit une nouvelle garde G2 au dessus des pistes de connexion PT de sorte que ces pistes de connexion sont prises en sandwich entre la garde Gl (correspondant à la garde G sur la figure lb) et la garde G2 qui sont à un même potentiel de garde, notamment reliées électriquement entre elles. Ces pistes de connexion PT peuvent être recouvertes d'un diélectrique puis d'une couche métallique (garde métallique) ou de la couche de conducteur transparent ITO (garde transparente) reliée au potentiel de garde par la liaison flexible CF. Ainsi ces pistes de connexion PT ne peuvent pas créer de capacité indésirable mesurée par l'électronique. Elles ne peuvent pas réagir à la présence d'un objet sur le bord de la dalle comme dans l'exemple des figures 2 et 3. In Figure 4, we see a slab according to the invention. The transparent edge tracks 7 of FIG. 3 have disappeared, they have been moved inwardly into connection tracks 8 between two rows of electrodes. Thus, the electrodes of the last row form the boundary with the access area around the electrode area. FIG. 5a shows the elements of FIG. 1b, but a new guard G2 is introduced above the connection tracks PT so that these connecting tracks are sandwiched between the guard G1 (corresponding to the guard G in FIG. 1b). ) and the guard G2 which are at the same guard potential, in particular electrically connected to each other. These PT connection tracks can be covered with a dielectric then a metal layer (metal guard) or the transparent conductor layer ITO (transparent guard) connected to the guard potential by the flexible link CF. Thus these PT connection tracks can not create unwanted capacity measured by the electronics. They can not react to the presence of an object on the edge of the slab as in the example of Figures 2 and 3.
En fait sur toute la zone d'accès correspondant à la surface de non détection, on dispose deux gardes pour prendre en sandwich toutes pistes métalliques et transparentes s'y trouvant. Et dans la zone transparente, correspondant à la surface de détection, on ne laisse aucune piste transparente sur le bord extérieur des électrodes.  In fact over the entire access area corresponding to the non-detection surface, there are two guards to sandwich any metal tracks and transparent therein. And in the transparent area, corresponding to the detection surface, no transparent track is left on the outer edge of the electrodes.
Les pistes de liaison ne sont pas visibles sur la figure 5a.  Link tracks are not visible in Figure 5a.
Par contre, sur la figure 5b est représenté un exemple de réalisation dans lequel des pistes de liaison PL permettent de relier des pistes de connexion conductrices PT à des électrodes E disposées sur une surface d'électrodes. Les électrodes sont transparentes en matériau ITO.  On the other hand, FIG. 5b shows an exemplary embodiment in which connection tracks PL make it possible to connect conductive connection tracks PT to electrodes E disposed on an electrode surface. The electrodes are transparent in ITO material.
Les pistes de liaison PL sont transparentes lorsqu'elles sont dans la zone de détection correspondant à la surface de détection SD. Elles peuvent être métalliques dans la zone d'accès. Dans la zone d'accès, les pistes de connexion PT sont disposées, sans contact, en sandwich entre une garde G2 en dessous et une garde G3 au dessus. Les gardes G2 et G3 sont de préférence métalliques, mais peuvent également être en matériau transparent ITO. La garde G2 peut être un prolongement de la garde Gl prévue pour les électrodes E. Selon l'invention, il est prévu de remplacer la garde G3 (placée au-dessus des pistes de connexion) par des électrodes (au moins une) de mesure. En effet, ces électrodes comme toutes les autres peuvent jouer le rôle de garde pour des pistes se trouvant en-dessous d'elles. Ces électrodes disposées sur le côté du dispositif peuvent servir principalement à la détection de bord, c'est-à-dire la détection d'objet, comme les doigts, disposé sur le bord du dispositif. La figure 6 montre la solution générale en vue de dessus avec les pistes métalliques 5 situées entre deux gardes Gl et G2. Toute piste sur les bords a été supprimée. Avantageusement, les connecteurs flexibles CF sont également disposés entre Gl et G2. Toutes les pistes transparentes 8 dans la zone transparente 6 sont situées entre deux rangées d'électrodes. The connection tracks PL are transparent when they are in the detection zone corresponding to the detection surface SD. They can be metallic in the access zone. In the access area, the connection tracks PT are arranged, without contact, sandwiched between a guard G2 below and a guard G3 above. The guards G2 and G3 are preferably metallic, but may also be made of transparent ITO material. The guard G2 may be an extension of the guard G1 provided for the electrodes E. According to the invention, it is intended to replace the guard G3 (placed above the connecting tracks) by electrodes (at least one) of measurement . Indeed, these electrodes like all others can play the role of guard for tracks located below them. These electrodes arranged on the side of the device can be used mainly for edge detection, that is to say the object detection, as the fingers, disposed on the edge of the device. Figure 6 shows the general solution in top view with the metal tracks 5 located between two guards G1 and G2. Any track on the edges has been removed. Advantageously, the flexible connectors CF are also arranged between G1 and G2. All the transparent tracks 8 in the transparent zone 6 are located between two rows of electrodes.
Selon l'invention, on peut par exemple détecter les quatre doigts (au moins deux doigts) d'un côté de l'appareil et le pouce de l'autre côté, pour déduire si l'appareil est tenu dans la main gauche ou droite. Suivant si c'est un droitier ou un gaucher, on peut repositionner toutes ou certaines commandes tactiles (icônes), gestuelle ou « hovering » pour optimiser l'ergonomie. According to the invention, it is possible, for example, to detect the four fingers (at least two fingers) on one side of the apparatus and the thumb on the other side to deduce whether the apparatus is held in the left or right hand. . Next if it's right-handed or left-handed, you can reposition all or some touch commands (icons), gesture or "hovering" to optimize ergonomics.
On peut par exemple placer correctement un bouton (icône) face au pouce de la main qui porte l'appareil, dégager les icônes se situant sous ou trop proches des quatre autres doigts afin de faciliter la commande avec l'autre main.  For example, you can correctly place a button (icon) in front of the thumb of the hand that carries the device, clear the icons located under or too close to the other four fingers to facilitate control with the other hand.
On peut aussi désactiver certaines commandes considérées trop mal placées par rapport aux doigts maintenant l'appareil.  You can also disable some commands considered too misplaced compared to the fingers now the device.
On peut aussi rechercher la zone la plus éloignée des doigts tenant l'appareil pour optimiser la portée en « hovering ». Ce dernier mode est très sensible aux effets de bord, et des doigts en bord réduisent considérablement la portée en « hovering ».  One can also look for the area furthest from the fingers holding the device to optimize the range in "hovering". The latter mode is very sensitive to edge effects, and edge fingers significantly reduce the range in "hovering".
On peut aussi rapprocher des commandes spécifiques des quatre doigts qui tiennent l'appareil pour rajouter des possibilités de commande avec ces doigts.  One can also bring specific commands of the four fingers that hold the device to add control possibilities with these fingers.
La détection capacitive des doigts ou tout objet à proximité de la dalle peut avantageusement se faire avec des électrodes individuelles protégées côté écran par une garde dont le potentiel est sensiblement égal à celui des électrodes car les capacités mesurées sont très faibles (jusqu'à quelques fF) et toute capacité de fuite parasite non désirée dégraderait la détection.  The capacitive detection of the fingers or any object near the slab can advantageously be done with individual electrodes shielded on the screen side by a guard whose potential is substantially equal to that of the electrodes because the measured capacitances are very low (up to a few fF). ) and any unwanted parasitic leakage capability would degrade the detection.
L'électronique gère chaque électrode afin de mesurer chaque capacité inter électrode-objet. Les objets détectés sont référencés au potentiel de masse de l'électronique.  The electronics manages each electrode to measure each inter-electrode-object capacitance. The detected objects are referenced to the ground potential of the electronics.
Des électrodes peuvent aussi être placées sur les côtés de l'appareil portable afin d'augmenter les possibilités de détection d'objet à proximité. On peut aussi détecter la forme de l'objet comme par exemple d'une main afin de savoir dans quel sens (recto ou verso) l'appareil est tenu dans la main. Electrodes can also be placed on the sides of the portable device to increase nearby object detection capabilities. We can also detect the shape of the object such as a hand to know in which direction (front or back) the device is held in the hand.
Si la surface est très plane et qu'aucune présence d'objet n'est détectée sur les côtés, on peut déduire que l'appareil est posé sur une surface plane comme une table ou logé dans une poche d'un vêtement.  If the surface is very flat and no object presence is detected on the sides, it can be deduced that the device is placed on a flat surface such as a table or housed in a pocket of a garment.
La figure 7 est une vue schématique de face d'un dispositif selon l'invention. On constate que la garde G2 est un cadre faisant tout le tour de la surface transparente 6. La garde Gl, non visible sur la figure 6 est disposée dans un plan parallèle à la garde G2 de façon à encadrer des pistes métalliques. Figure 7 is a schematic front view of a device according to the invention. It can be seen that the guard G2 is a frame running around the transparent surface 6. The guard G1, not visible in FIG. 6, is disposed in a plane parallel to the guard G2 so as to frame metal tracks.
Sur la figure 8, on voit un autre exemple de réalisation du dispositif selon l'invention. Dans cet exemple, la surface d'électrodes est un rectangle pour lequel les pistes de liaison 9 en matériau transparent relient les électrodes depuis la surface vers des zones d'accès 10 et 11 sur les petits côtés du rectangle. Les gardes Gl et G2 sont disposées en sandwich dans ces zones d'accès. On dispose dans chaque zone d'accès un circuit intégré ICI, IC2, connecté aux pistes de liaison provenant des électrodes les plus proches. Les pistes peuvent être métalliques entre la surface transparente et les circuits intégrés.  In Figure 8, we see another embodiment of the device according to the invention. In this example, the electrode surface is a rectangle for which the connecting tracks 9 of transparent material connect the electrodes from the surface to access areas 10 and 11 on the short sides of the rectangle. Guards G1 and G2 are sandwiched in these access areas. In each access zone there is an integrated circuit IC1, IC2, connected to the connection tracks coming from the nearest electrodes. The tracks can be metallic between the transparent surface and the integrated circuits.
Cette solution permet d'éviter de placer des pistes de connexion conductrices sur les longs côtés que l'on utilise la plus part du temps pour maintenir l'appareil. L'avantage est la suppression des longues pistes sur les côtés verticaux. On utilise tout de même quelques pistes de connexion conductrices 12 sur les côtés verticaux pour que les deux circuits intégrés puissent communiquer entre eux. Mais ces pistes 12 n'ont pas besoin d'être gardées. Les deux circuits intégrés peuvent utiliser le même potentiel de garde. Le circuit intégré IC2 est ensuite relié à une unité de traitement via la limande CF.  This solution avoids placing conductive connection tracks on long sides that are used most of the time to maintain the device. The advantage is the removal of long tracks on the vertical sides. Still some conductive connection tracks 12 are used on the vertical sides so that the two integrated circuits can communicate with each other. But these tracks do not need to be kept. Both integrated circuits can use the same guard potential. The integrated circuit IC2 is then connected to a processing unit via the floss CF.
Les électrodes recouvrent de préférence le plus possible la surface sensible de la dalle. The electrodes preferably cover as much as possible the sensitive surface of the slab.
On peut imaginer des électrodes ayant une forme plus complexe qu'un rectangle comme on peut le voir sur les figures 9 à 12. L'utilisation d 'électrodes triangu laires ou concaves peut permettre de réd uire au maximum leur nombre tout en conservant la même performance (précision) de détection . On peut en effet exploiter les formes triangu laires pour rajouter une information de mesure en jouant sur la géométrie évolutive de chaque électrode par rapport à la position de l'objet. One can imagine electrodes having a more complex shape than a rectangle as can be seen in FIGS. 9 to 12. The use of triangular or concave electrodes can reduce their number as much as possible while maintaining the same detection performance (accuracy). We can indeed use the triangular forms to add measurement information by playing on the evolutionary geometry of each electrode relative to the position of the object.
Les électrodes concaves imbriquées les unes dans les autres peuvent permettre de réd uire le défaut de rupture franche lors d u passage d 'u n objet d 'une électrode à l'autre ou de rajouter de l'information en jouant sur la géométrie évol utive de chaque électrode par rapport à la position de l'objet.  The concave electrodes nested inside each other can make it possible to reduce the frank fracture defect during the passage of an object from one electrode to the other or to add information by playing on the evolutive geometry of each electrode relative to the position of the object.
Bien sûr, l'invention n'est pas limitée aux exemples q ui viennent d 'être décrits et de nombreux aménagements peuvent être apportés à ces exemples sans sortir d u cad re de l'invention . Of course, the invention is not limited to the examples which have just been described and many adjustments can be made to these examples without departing from the scope of the invention.

Claims

REVENDICATIONS
1. Dispositif d'interface homme-machine présentant une zone de détection transparente et une zone d'accès, ce dispositif comprenant : A human-machine interface device having a transparent detection zone and an access zone, said device comprising:
- une surface d'électrodes en matériau transparent conducteur dans la zone de détection,  an electrodes surface made of conductive transparent material in the detection zone,
- des pistes de connexion conductrices disposées dans la zone d'accès et connectées à la surface d'électrodes,  conductive connection tracks arranged in the access zone and connected to the electrode surface,
- une première surface conductrice en matériau transparent dans la zone transparente, utilisée comme garde pour la surface d'électrodes,  a first conductive surface of transparent material in the transparent zone, used as a guard for the electrode surface,
caractérisé en ce que les pistes de connexion conductrices sont disposées au moins partiellement en sandwich entre une seconde et une troisième surfaces conductrices utilisées comme seconde et troisième gardes pour ces pistes de connexion conductrices, et en ce qu'il comprend des pistes de liaison en matériau conducteur pour relier les pistes de connexion conductrices à des électrodes de la surface d'électrodes ; lorsqu'une piste de liaison longe au moins une électrode sur la surface de détection, cette piste de liaison est en matériau transparente et positionnée entre au moins deux électrodes.  characterized in that the conductive connection tracks are arranged at least partially sandwiched between a second and a third conductive surface used as second and third guards for these conductive connection tracks, and in that it comprises connecting tracks made of material conductor for connecting the conductive connection tracks to electrodes of the electrode surface; when a connecting track runs along at least one electrode on the detection surface, this connecting track is made of transparent material and positioned between at least two electrodes.
2. Dispositif selon la revendication 1, caractérisé en ce que lorsqu'une piste de liaison est située dans la zone d'accès, cette piste de liaison est positionnée entre les seconde et troisième gardes. 2. Device according to claim 1, characterized in that when a connecting track is located in the access area, this connecting track is positioned between the second and third guards.
3. Dispositif selon la revendication 1 ou 2, caractérisé en ce qu'au moins l'une des deuxième et troisième surfaces conductrices est à un même potentiel de garde que la première surface conductrice. 3. Device according to claim 1 or 2, characterized in that at least one of the second and third conductive surfaces is at the same guard potential as the first conductive surface.
4. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que l'une des deuxième et troisième surfaces conductrices est un prolongement de la première surface conductrice. 4. Device according to any one of the preceding claims, characterized in that one of the second and third conductive surfaces is an extension of the first conductive surface.
5. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que les électrodes et les gardes sont conçues à partir de l'oxyde d'indium dopé à l'étain ITO. 5. Device according to any one of the preceding claims, characterized in that the electrodes and the guards are designed from indium oxide doped with tin ITO.
6. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que les électrodes sont de forme rectangulaire. 6. Device according to any one of the preceding claims, characterized in that the electrodes are of rectangular shape.
7. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que les électrodes sont de forme triangulaire. 7. Device according to any one of the preceding claims, characterized in that the electrodes are of triangular shape.
8. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que les électrodes sont de forme concave. 8. Device according to any one of the preceding claims, characterized in that the electrodes are of concave shape.
9. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que les gardes sont conçues sur la base d'une technologie à pont flottant. 9. Device according to any one of the preceding claims, characterized in that the guards are designed on the basis of a floating bridge technology.
10. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que la mesure capacitive est de type self capacitance. 10. Device according to any one of the preceding claims, characterized in that the capacitive measurement is of the self capacitance type.
11. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce qu'au moins une électrode est disposée sur le côté du dispositif, hors ladite zone de détection. 11. Device according to any one of the preceding claims, characterized in that at least one electrode is disposed on the side of the device, outside said detection zone.
12. Dispositif selon la revendication 11, caractérisé en ce que ladite au moins une électrode est disposée en lieu et place de la troisième surface conductrice. 12. Device according to claim 11, characterized in that said at least one electrode is disposed in place of the third conductive surface.
13. Procédé mis en œuvre dans un appareil comprenant un dispositif d'interface homme-machine tel que défini dans l'une quelconque des revendications précédentes, caractérisé en ce qu'on détecte les doigts disposés sur les bords de l'appareil et on modifie les fonctionnalités de l'écran d'affichage de l'appareil en fonction de la disposition des doigts détectés. 13. Method implemented in an apparatus comprising a human-machine interface device as defined in any one of the preceding claims, characterized in that the fingers disposed on the edges of the apparatus are detected and modified. the features of the display screen of the device according to the disposition of the detected fingers.
14. Procédé selon la revendication 13, caractérisé en ce qu'on détermine le nombre et le positionnement des doigts de façon à identifier le type de main tenant l'appareil . 14. The method of claim 13, characterized in that the number and positioning of the fingers is determined so as to identify the type of hand holding the device.
15. Procédé selon la revendication 13 ou 14, caractérisé en ce qu'en absence de détection de doigts sur les bords, on identifie si l'appareil est posé sur son support côté surface sensible ou pas. 15. The method of claim 13 or 14, characterized in that in the absence of detection of fingers on the edges, it is identified whether the device is placed on its support sensitive surface side or not.
16. Procédé selon l'une quelconque des revendications 13 à 15, caractérisé en ce qu'on utilise un bord du dispositif pour détecter tout déplacement d'objet au moyen d'électrodes de la surface d'électrodes de façon à enclencher des commandes au sein de l'appareil . 16. A method according to any one of claims 13 to 15, characterized in that an edge of the device is used to detect any object displacement by means of electrodes of the electrode surface so as to trigger commands to the within the device.
PCT/EP2013/057900 2012-04-25 2013-04-16 Device for capacitive detection with arrangement of linking tracks, and method implementing such a device WO2013160151A1 (en)

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CN201380021798.1A CN104321726B (en) 2012-04-25 2013-04-16 Device for capacitive detection with arrangement of linking tracks, and method implementing such a device
JP2015507470A JP6463669B2 (en) 2012-04-25 2013-04-16 Capacitance detection device having link track arrangement, and method for mounting the device
US14/115,008 US9104283B2 (en) 2012-04-25 2013-04-16 Capacitive detection device with arrangement of linking tracks, and method implementing such a device
KR1020147030605A KR102028783B1 (en) 2012-04-25 2013-04-16 Device for capacitive detection with arrangement of linking tracks, and method implementing such a device
EP13721285.8A EP2842018A1 (en) 2012-04-25 2013-04-16 Device for capacitive detection with arrangement of linking tracks, and method implementing such a device

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FR1253820A FR2990020B1 (en) 2012-04-25 2012-04-25 CAPACITIVE DETECTION DEVICE WITH ARRANGEMENT OF CONNECTION TRACKS, AND METHOD USING SUCH A DEVICE.
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